Apparatus for molding wax and other materials.



A. McD. GRAY.

APPARATUS FOR MOLDING WAX AND OTHER MATERIALS.

APPLICATION flLED AUG. 7, l9l3.

m25gmm I Patented May8,1917.

- wmww 'ing APPARATUS FOR MOLDING WAX OTHER MATERIALS:

Specification of Letters Patent.

Patented. May 8, 191?.

Application filed. August 7; 1913. Serial no. 'rssaaa.

To all whom it may concern:

Be it known that I, ALANSON McD. GRAY, a citizen of the United States,residing in Elizabeth, in the county of Union, State of New Jersey, haveinvented certain new and useful Improvements in Apparatus for MoldinglV-ax and other Materials, of which the following is a specification.

This invention is an improvement upon the organization described in ULS. Letters fgatgnt, No. 653,285, granted to me July 10,

The invention contemplates the use of molding plates set up in series inalternation with hollow chilling plates in which a coolmedium iscirculated.

In the accompanying drawing:

Figure -1, is a side elevation somewhat diagrammatic Fig. 2, atransverse section on line A, E, Fig. 1: and Fig. 3, a plan viewindicating the heating pipes of a cap that is to be disposed over thetop of the assemblage of molding and chilling plates.

1 may be an ordinary hydraulic cylinder;

' 2 its ram; 3 an abutment and 4, 4, the side rails of an ordinaryfilter press.

The molding plates may be open castings composed of vertical end parts 5connected by a bottom portion 6 and divided into two compartments by acentral vertically disposed 7 On such molding plates are formed earssuspended upon the parallel side rails 4. The end portions 5 of eachplate are, as

seen in Fig. 2, extended somewhat above Y the upper face of thepartition piece 7 The molding plates are closed at the sides by thechilling plates arranged in alternation with the molding plates. Thesechilling plates maybe castings of rectangular shape conforming generallyto the rectangular outline of the molding plates. They have end portions9, 9, corresponding with the upward extension of the parts 5 of themolding plates. Each chilling plate is formed on opposite ends with ears12, 12, (similar to the ears 8 of the molding plates) by which it iscarried upon the side rails 4, see Fig. 1.

The sides of the chilling plates form, where I the two kinds of platesare assembled in alternation, the closures for the ordinarily open sidesof the molding plates. The upper edges of the sides of the outerchilling plates 8 by which the plates are of the series of platesdisposed in alternation are in plane with the tops of the end extensionsso that when the two series of plates are set up by the ram there is asurrounding curb or flange. The melted paraiiin wax may be supplied fromcocks 14, 14 and will fill the mold cavities of the molding plates.

The foregoing is all fully disclosed in-the Letters Patent abovementioned, as is also a means of circulating the cooling medium,

such as cold water or reIrigerated brine,

through the chilling plates.

. The cooling fluid is supplied to each of the chilling plates by aflexible connection 15 connecting its bottom to a main supply pipe 16.The outlet pipes 17 also are connected to the bottoms of the chillingplates and through them the fluid is discharged into a-trough 18,located beneath the apparatus. This arrangement of the cooling fluidconnections is elaborated and claimed in a copending application filedby me August 3, 1916, under Serial Number 112,942.

Experience has shown that in operating the system of the patent, the waxat the; tops of the molding plates solidifies in a porous or spongyform, or at least lacks the homogeneous solidification thatcharacterizes the cakes of wax in the lower parts 0 the mold cavitiesand that this objectionable feature is removed by the use of thefollowing means.

This feature of this invention consists in applying heat to the tops ofthe series of mold cavities so that the waxor other material will settlesolidly and chill uniformly throughout the entire section of the variousmolding plates. This plan may best be carried out by providing what maybe termed hot caps that may be shallow inverted troughs of sheet metal,fitting within the curb formed at the top of the assemblage of platesand carrying within it a heating coil or coils 20. The hot cap, asillustrated, which extends substantially the length of the assemblage orseries of plates, is for convenience formed in two sections 21, 21, eachsuspended by appropriate cables running over pulleys and carryingcounter weights 2, so that they may readily be thrown up or lowered tooperative position, The mold ing plates may be filled when the hot capsare elevated. 23 indicates diagrammatically a steam inlet pipe branchedto the steam 1 from the outer ends of the two coils there are steamdischarges or I claim: v 1. An assemblage of molding and chilling platesarranged in alternation and heating caps adapted to cover. the top ofsuchassemblage of plates.

outlets 24:, 24.

2. An assemblage of molding and chilling plates'arranged in alternation,heating caps adapted'to cover the top of such assemblage plied to theheating caps whereby the latter may readily be elevated to inoperativeposition or lowered to operative position over the assemblage of plates.

In testimony whereof, I have hereunto subscribed my name. ALA- NSONM01). GRAY. Witnesses: FLORENCE MEIS ER',

HELEN DE More.

